 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.update.internal.ui.wizards;
 import java.net.*;

 import org.eclipse.jface.wizard.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.update.internal.ui.*;

 public abstract class BannerPage extends WizardPage {
     private Image bannerImage;
     private boolean bannerVisible = false;
     public BannerPage(String name) {
         super(name);
     }

     public void createControl(Composite parent) {
         Composite client = new Composite(parent, SWT.NULL);
         GridLayout layout = new GridLayout();
         layout.numColumns = 2;
         layout.horizontalSpacing = 10;
         client.setLayout(layout);

         if (bannerVisible) {
             Label label = new Label(client, SWT.NULL);
             label.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING));
             label.setImage(getBannerImage());
         }

         Control contents = createContents(client);
         contents.setLayoutData(new GridData(GridData.FILL_BOTH));
         setControl(client);
     }

     public void setBannerVisible(boolean visible) {
         this.bannerVisible = visible;
     }
     public boolean isBannedVisible() {
         return bannerVisible;
     }

     protected URL getBannerImageURL() {
         return null;
     }
     private Image getBannerImage() {
         URL imageURL = getBannerImageURL();
         Image image = null;
         if (imageURL == null) {
             // use default
 bannerImage =
                 UpdateUIImages.DESC_INSTALL_BANNER.createImage();
             image = bannerImage;
         }
         return image;
     }

     public void dispose() {
         if (bannerImage != null) {
             bannerImage.dispose();
         }
         super.dispose();
     }

     protected abstract Control createContents(Composite parent);
 }

